Ubuntu file permision

Linux always may give you troubles with permissions so i will show you few command lines what can help you in this situation:

1)Create a group www-data

   sudo addgroup www-data

2) Add user nginx in group www-data

  sudo adduser nginx groupname

Add an existing user nginx to group www-data

  usermod -a -G www-data nginx

3) Set group www-data to folder /var/www

  sudo chown -R "$USER":www-data /var/www

4) Set permisions to all the folders from /var/www to 0755

  sudo find /var/www -type d -exec chmod 755 {} \;

5) Set permision to all the files from directory /var/www to 0664 -this need for security reasons

  find /var/www -type f -exec chmod 664 {} \;